Home / 20,689.35-31,030.95-7,538.66

Finding the Fourth Proportional to 20,689.35, 31,030.95 and 7,538.66

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Solution

The fourth proportional to 20,689.35, 31,030.95 and 7,538.66 is: 11,306.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.35 : 31,030.95 = 7,538.66 : x
  2. Step 2: Convert to fraction form
    20,689.35/31,030.95 = 7,538.66/x
  3. Step 3: Cross multiply
    20,689.35x = 31,030.95 × 7,538.66
  4. Step 4: Simplify right side
    20,689.35x = 233,931,626.37
  5. Step 5: Solve for x
    x = 233,931,626.37/20,689.35
  6. Step 6: Final answer
    x = 11,306.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.